question_answer 68)

    Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can be identify the produced gas. Write chemical equations for both the reactions.

Answer:

                  The divalent element M is Zn. The produced gas can be identified by bringing a burning splinter near the gas (mouth of the reaction vessel). The gas burns with a pop sound, hence it is hydrogen.